Evidence map›Paper›PMID 37333664›Full record

ArticleEClinicalMedicine2023

Impact of general anaesthesia on breast cancer survival: a 5-year follow up of a pragmatic, randomised, controlled trial, the CAN-study, comparing propofol and sevoflurane.

Mats Enlund, Anders Berglund, Anna Enlund, Johan Lundberg, Fredrik Wärnberg, Dong-Xin Wang, Andreas Ekman, Rebecca Ahlstrand, Per Flisberg, Lars Hedlund and 3 more

2 registry-linked trialsOpen access · goldAbstract read
In one paragraph

Article in EClinicalMedicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
8.5field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT01975064 phase4completednot on this map

A Randomized, Open-label Study to Compare Propofol Anesthesia With Sevoflurane Anesthesia in Terms of Overall Survival in Patients With Surgical Intervention for Either Breast-, Colon- or Rectal Cancer

TypeinterventionalSponsorUppsala UniversityRan2013 to 2022Enrolled5,774ConditionsBreast Neoplasms, Colonic Neoplasms, Rectal NeoplasmsArmsPropofol, Sevoflurane
NCT07689253 completednot on this mapstarted 2025, after this paper: background citation

Does Anesthesia Technique Impact on the Long-term Outcome 5 and 10 Years After the First Intervention in Primary Breast Cancer Surgery? A Follow-up Analysis.

TypeobservationalSponsorUniversity of ZurichRan2025 to 2026Enrolled161ConditionsBreast Cancer Females, Circulating Tumor Cells.Breast, Follow Up Analysis
3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 38 citations in OpenAlex.

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  9. Propofol versus sevoflurane: how many RCTs is enough?Critical care (London, England) · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors at 7 institutions in 2 countries.

Mats EnlundCentre for Clinical Research, Västmanland Hospital Västerås, University of Uppsala, Sweden.
Anders BerglundEpistat AB, Uppsala, Sweden.
Anna EnlundCentre for Clinical Research, Västmanland Hospital Västerås, University of Uppsala, Sweden.
Johan LundbergDepartment of Perioperative and Intensive Care, Skåne University Hospital, Lund, Sweden.
Fredrik WärnbergDepartment of Surgical Sciences, Uppsala University, Uppsala, Sweden.
Dong-Xin WangDepartment of Anaesthesiology, Peking University First Hospital, Beijing, China.
Andreas EkmanDepartment of Anaesthesia and Intensive Care, Kalmar Hospital, Kalmar, Sweden.
Rebecca AhlstrandDepartment of Anaesthesia and Intensive Care, Örebro University Hospital, Örebro, Sweden.
Per FlisbergDepartment of Anaesthesia and Intensive Care, Helsingborg Hospital, Helsingborg, Sweden.
Lars HedlundDepartment of Anaesthesia and Intensive Care, Skellefteå Hospital, Sweden.
Ingrid ÖstlundDepartment of Perioperative and Intensive Care, Skåne University Hospital, Lund, Sweden.
Leif BergkvistCentre for Clinical Research, Västmanland Hospital Västerås, University of Uppsala, Sweden.
CAN-study group
Skåne University Hospital · SEHelsingborgs lasarett · SELandstinget i Kalmar län · SEÖrebro University Hospital · SEPeking University · CNSkellefteå Hospital · SEUppsala University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Anaesthesia may impact long-term cancer survival. In the Cancer and Anaesthesia study, we hypothesised that the hypnotic drug propofol will have an advantage of at least five percentage points in five-year survival over the inhalational anaesthetic sevoflurane for breast cancer surgery. Methods: From 2118 eligible breast cancer patients scheduled for primary curable, invasive breast cancer surgery, 1764 were recruited after ethical approval and individual informed consent to this open label, single-blind, randomised trial at four county- and three university hospitals in Sweden and one Chinese university hospital. Of surveyed patients, 354 were excluded, mainly due to refusal to participate. Patients were randomised by computer at the monitoring organisation to general anaesthesia maintenance with either intravenous propofol or inhaled sevoflurane in a 1:1 ratio in permuted blocks. Data related to anaesthesia, surgery, oncology, and demographics were registered. The primary endpoint was five-year overall survival. Data are presented as Kaplan-Meier survival curves and Hazard Ratios based on Cox univariable regression analyses by both intention-to-treat and per-protocol. EudraCT, 2013-002380-25 and ClinicalTrials.gov, NCT01975064. Findings: Of 1764 patients, included from December 3, 2013, to September 29, 2017, 1670 remained for analysis. The numbers who survived at least five years were 773/841 (91.9% (95% CI 90.1-93.8)) in the propofol group and 764/829 (92.2% (90.3-94.0)) in the sevoflurane group, (HR 1.03 (0.73-1.44); P = 0.875); the corresponding results in the per-protocol-analysis were: 733/798 (91.9% (90.0-93.8)) and 653/710 (92.0% (90.0-94.0)) (HR = 1.01 (0.71-1.44); P = 0.955). Survival after a median follow-up of 76.7 months did not indicate any difference between the groups (HR 0.97, 0.72-1.29; P = 0.829, log rank test). Interpretation: No difference in overall survival was found between general anaesthesia with propofol or sevoflurane for breast cancer surgery. Funding: Swedish Research Council; Uppsala-Örebro Regional Research Council; Västmanland Regional Research Fund; Västmanland Cancer Foundation; Stig and Ragna Gohrton Foundation; Birgit and Henry Knutsson Foundation.

Indexed as

AnaesthesiaBreast cancerInhalationIntravenousSurvival analysis

Identifiers

PMID37333664
PMCPMC10276257
OpenAlexW4380203591

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.